I was looking at another RPGMaker game. Their sprite is 75 pixels tall, 8Directional.
https://x.com/Quorum_Games/status/1916933445361754339/photo/1
Even on the "Tall Sprite" RPGmaker forum thread, there are sprites anywhere from 50-90 pixels tall:
https://forums.rpgmakerweb.com/index.php?threads/stand-tall-a-list-for-tall-mv-s...
So I think the height can work, it's all relative to the scale / style of your game I guess.
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Appreciate your time / discussion / amazing work by the way.